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8/9/2008 Food budgetThe charts below show the percentage of their food budget the average family spent on restaurant meals in different years. The graph shows the number of meals eaten in fast food restaurants and sit-down restaurants.   The percentages of the food spending on restaurant meals versus home cooking are shown in the pie charts.And the line graphs show the number of meals consumed in fast-food and sit-down restaurant.Both data are collected in period of 1970 through 2000. In 1970, there was a huge difference between budget spent on restaurant meals(10%) and the budget spent on home cooking.For the next decade,the number in percentage of restaurant spending increased slightly to 15%. After that, there was a sharp rise of the food budget spending outside,it had reached 35% in 1990,and finally, 50% in 2000.
In term of the number of meals eaten per year, there was a dramatic increase in the number fast food meals consumed.It began with 20 meals per year in 1970 and rose up to nearly 90 meals per year in 2000, while the sit-down restuarants are grew gradually from 20 meals per year in 1970 up to 50 meals per year in 2000. 8/8/2008 Heating systemThe diagram below shows how a central heating system in a house works.
The picture illustrate a heat circular of a heating system.It contains a water tank, a storage tank, a boiler, a pump and radiators.The heat is conducted by a water flows in pipes. Firstly,cold water flow in the house and flow directly into the storage tank, which located at the second floor.The storage is used to make sure the steady flows of water.From the storage tank, water flow out to the boiler.The water is heated up by the boiler ,which use gar or oil as fuel, before pumped to the radiators round house.The radiators contains many small tubes that emit the heat from water.After that, the water turn into cold water and flow back to the boiler again. |
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